The correct answer is Coffeecup.CoffeeCup HTML Editor is a freeware tool, which makes it easy to develop web pages using HTML/CSS.Installation of the software on a Windows PC was equally easy. Live Preview of a web page is a handy feature provided by the tool.Additional InformationPHP;?PHP is the most popular server scripting language on the web that is used to develop Static and Dynamic websites or web applications.PHP is a general-purpose scripting language geared toward web development. It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1994.C#;?C# is pronounced as "C-Sharp".It is an object-oriented programming language provided by Microsoft that runs on .Net Framework.?Python;?Python is a high-level, general-purpose programming language.Its design philosophy emphasizes code readability with the use of significant indentation.Mistake PointsPHP is a general-purpose scripting language not a Free open source software for website designing.